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The redox potential of the T1 copper site of laccase from Fusarium proliferatum was determined by titration to be about 510mV vs. SCE (750mV vs. NHE), which makes it a high redox potential enzyme. Anaerobic electron transfer reactions between laccase and carbon and gold electrodes were detected, both in solution and when the enzyme was adsorbed on these surfaces. In solution, a single high-potential...
Melanin-modified highly oriented pyrolytic graphite (HOPG) surfaces have been prepared by a simple electrochemical method from synthetic eumelanin-containing aqueous solutions. The melanin film turns the chemically inert HOPG surface into a highly active surface able to bind metallic cations. Iron–melanin-modified HOPG surfaces catalyze the hydrogen peroxide electroreduction. These results are interesting...
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